package com.qmy.utils;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

//sqlSession Factory
public class MybatisUtils {
    private static  SqlSessionFactory sqlSessionFactory;
    static {
        try {
            //获取sqlsession对象
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    //有了sqlseesion 可以获取其中的实例了其包含了所有面向对象执行的sql命令所需的方法

    public static SqlSession getSqlSession(){
        return sqlSessionFactory.openSession();

    }
}
